diff --git a/llvm/test/Transforms/LoopUnroll/unroll-loads-cse.ll b/llvm/test/Transforms/LoopUnroll/unroll-loads-cse.ll new file mode 100644 index 0000000000000..109a1834c3029 --- /dev/null +++ b/llvm/test/Transforms/LoopUnroll/unroll-loads-cse.ll @@ -0,0 +1,480 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 +; RUN: opt -p loop-unroll -S %s | FileCheck %s + +target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" + +define void @cse_matching_load_from_previous_unrolled_iteration(ptr %src, ptr noalias %dst, i64 %N) { +; CHECK-LABEL: define void @cse_matching_load_from_previous_unrolled_iteration( +; CHECK-SAME: ptr [[SRC:%.*]], ptr noalias [[DST:%.*]], i64 [[N:%.*]]) { +; CHECK-NEXT: entry: +; CHECK-NEXT: [[SRC_4:%.*]] = getelementptr i8, ptr [[SRC]], i64 4 +; CHECK-NEXT: [[SRC_12:%.*]] = getelementptr i8, ptr [[SRC]], i64 12 +; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], -1 +; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[N]], 1 +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[TMP0]], 1 +; CHECK-NEXT: br i1 [[TMP1]], label [[EXIT_UNR_LCSSA:%.*]], label [[ENTRY_NEW:%.*]] +; CHECK: entry.new: +; CHECK-NEXT: [[UNROLL_ITER:%.*]] = sub i64 [[N]], [[XTRAITER]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[IV_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[GEP_SRC_12:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV]] +; CHECK-NEXT: [[L_12:%.*]] = load i64, ptr [[GEP_SRC_12]], align 8 +; CHECK-NEXT: [[GEP_SRC_4:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV]] +; CHECK-NEXT: [[L_4:%.*]] = load i64, ptr [[GEP_SRC_4]], align 8 +; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[L_12]], [[L_4]] +; CHECK-NEXT: [[GEP_DST:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV]] +; CHECK-NEXT: store i64 [[MUL]], ptr [[GEP_DST]], align 8 +; CHECK-NEXT: [[IV_NEXT:%.*]] = add nuw nsw i64 [[IV]], 1 +; CHECK-NEXT: [[GEP_SRC_12_1:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_12_1:%.*]] = load i64, ptr [[GEP_SRC_12_1]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_1:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_4_1:%.*]] = load i64, ptr [[GEP_SRC_4_1]], align 8 +; CHECK-NEXT: [[MUL_1:%.*]] = mul i64 [[L_12_1]], [[L_4_1]] +; CHECK-NEXT: [[GEP_DST_1:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_NEXT]] +; CHECK-NEXT: store i64 [[MUL_1]], ptr [[GEP_DST_1]], align 8 +; CHECK-NEXT: [[IV_NEXT_1]] = add nuw nsw i64 [[IV]], 2 +; CHECK-NEXT: [[NITER_NEXT_1]] = add i64 [[NITER]], 2 +; CHECK-NEXT: [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]] +; CHECK-NEXT: br i1 [[NITER_NCMP_1]], label [[EXIT_UNR_LCSSA_LOOPEXIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP0:![0-9]+]] +; CHECK: exit.unr-lcssa.loopexit: +; CHECK-NEXT: [[IV_UNR_PH:%.*]] = phi i64 [ [[IV_NEXT_1]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT_UNR_LCSSA]] +; CHECK: exit.unr-lcssa: +; CHECK-NEXT: [[IV_UNR:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_UNR_PH]], [[EXIT_UNR_LCSSA_LOOPEXIT]] ] +; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 0 +; CHECK-NEXT: br i1 [[LCMP_MOD]], label [[LOOP_EPIL_PREHEADER:%.*]], label [[EXIT:%.*]] +; CHECK: loop.epil.preheader: +; CHECK-NEXT: br label [[LOOP_EPIL:%.*]] +; CHECK: loop.epil: +; CHECK-NEXT: [[GEP_SRC_12_EPIL:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_12_EPIL:%.*]] = load i64, ptr [[GEP_SRC_12_EPIL]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_EPIL:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_4_EPIL:%.*]] = load i64, ptr [[GEP_SRC_4_EPIL]], align 8 +; CHECK-NEXT: [[MUL_EPIL:%.*]] = mul i64 [[L_12_EPIL]], [[L_4_EPIL]] +; CHECK-NEXT: [[GEP_DST_EPIL:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_UNR]] +; CHECK-NEXT: store i64 [[MUL_EPIL]], ptr [[GEP_DST_EPIL]], align 8 +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: ret void +; +entry: + %src.4 = getelementptr i8, ptr %src, i64 4 + %src.12 = getelementptr i8, ptr %src, i64 12 + br label %loop + +loop: + %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ] + %gep.src.12 = getelementptr i64, ptr %src.12, i64 %iv + %l.12 = load i64, ptr %gep.src.12, align 8 + %gep.src.4 = getelementptr i64, ptr %src.4, i64 %iv + %l.4 = load i64, ptr %gep.src.4, align 8 + %mul = mul i64 %l.12, %l.4 + %gep.dst = getelementptr i64, ptr %dst, i64 %iv + store i64 %mul, ptr %gep.dst + %iv.next = add nuw nsw i64 %iv, 1 + %c = icmp eq i64 %iv.next, %N + br i1 %c, label %exit, label %loop, !llvm.loop !1 + +exit: + ret void +} + +define void @cse_different_load_types(ptr %src, ptr noalias %dst, i64 %N) { +; CHECK-LABEL: define void @cse_different_load_types( +; CHECK-SAME: ptr [[SRC:%.*]], ptr noalias [[DST:%.*]], i64 [[N:%.*]]) { +; CHECK-NEXT: entry: +; CHECK-NEXT: [[SRC_4:%.*]] = getelementptr i8, ptr [[SRC]], i64 4 +; CHECK-NEXT: [[SRC_12:%.*]] = getelementptr i8, ptr [[SRC]], i64 12 +; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], -1 +; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[N]], 1 +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[TMP0]], 1 +; CHECK-NEXT: br i1 [[TMP1]], label [[EXIT_UNR_LCSSA:%.*]], label [[ENTRY_NEW:%.*]] +; CHECK: entry.new: +; CHECK-NEXT: [[UNROLL_ITER:%.*]] = sub i64 [[N]], [[XTRAITER]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[IV_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[GEP_SRC_12:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV]] +; CHECK-NEXT: [[L_12:%.*]] = load i32, ptr [[GEP_SRC_12]], align 8 +; CHECK-NEXT: [[L_12_EXT:%.*]] = zext i32 [[L_12]] to i64 +; CHECK-NEXT: [[GEP_SRC_4:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV]] +; CHECK-NEXT: [[L_4:%.*]] = load i64, ptr [[GEP_SRC_4]], align 8 +; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[L_12_EXT]], [[L_4]] +; CHECK-NEXT: [[GEP_DST:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV]] +; CHECK-NEXT: store i64 [[MUL]], ptr [[GEP_DST]], align 8 +; CHECK-NEXT: [[IV_NEXT:%.*]] = add nuw nsw i64 [[IV]], 1 +; CHECK-NEXT: [[GEP_SRC_12_1:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_12_1:%.*]] = load i32, ptr [[GEP_SRC_12_1]], align 8 +; CHECK-NEXT: [[L_12_EXT_1:%.*]] = zext i32 [[L_12_1]] to i64 +; CHECK-NEXT: [[GEP_SRC_4_1:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_4_1:%.*]] = load i64, ptr [[GEP_SRC_4_1]], align 8 +; CHECK-NEXT: [[MUL_1:%.*]] = mul i64 [[L_12_EXT_1]], [[L_4_1]] +; CHECK-NEXT: [[GEP_DST_1:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_NEXT]] +; CHECK-NEXT: store i64 [[MUL_1]], ptr [[GEP_DST_1]], align 8 +; CHECK-NEXT: [[IV_NEXT_1]] = add nuw nsw i64 [[IV]], 2 +; CHECK-NEXT: [[NITER_NEXT_1]] = add i64 [[NITER]], 2 +; CHECK-NEXT: [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]] +; CHECK-NEXT: br i1 [[NITER_NCMP_1]], label [[EXIT_UNR_LCSSA_LOOPEXIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP3:![0-9]+]] +; CHECK: exit.unr-lcssa.loopexit: +; CHECK-NEXT: [[IV_UNR_PH:%.*]] = phi i64 [ [[IV_NEXT_1]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT_UNR_LCSSA]] +; CHECK: exit.unr-lcssa: +; CHECK-NEXT: [[IV_UNR:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_UNR_PH]], [[EXIT_UNR_LCSSA_LOOPEXIT]] ] +; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 0 +; CHECK-NEXT: br i1 [[LCMP_MOD]], label [[LOOP_EPIL_PREHEADER:%.*]], label [[EXIT:%.*]] +; CHECK: loop.epil.preheader: +; CHECK-NEXT: br label [[LOOP_EPIL:%.*]] +; CHECK: loop.epil: +; CHECK-NEXT: [[GEP_SRC_12_EPIL:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_12_EPIL:%.*]] = load i32, ptr [[GEP_SRC_12_EPIL]], align 8 +; CHECK-NEXT: [[L_12_EXT_EPIL:%.*]] = zext i32 [[L_12_EPIL]] to i64 +; CHECK-NEXT: [[GEP_SRC_4_EPIL:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_4_EPIL:%.*]] = load i64, ptr [[GEP_SRC_4_EPIL]], align 8 +; CHECK-NEXT: [[MUL_EPIL:%.*]] = mul i64 [[L_12_EXT_EPIL]], [[L_4_EPIL]] +; CHECK-NEXT: [[GEP_DST_EPIL:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_UNR]] +; CHECK-NEXT: store i64 [[MUL_EPIL]], ptr [[GEP_DST_EPIL]], align 8 +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: ret void +; +entry: + %src.4 = getelementptr i8, ptr %src, i64 4 + %src.12 = getelementptr i8, ptr %src, i64 12 + br label %loop + +loop: + %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ] + %gep.src.12 = getelementptr i64, ptr %src.12, i64 %iv + %l.12 = load i32, ptr %gep.src.12, align 8 + %l.12.ext = zext i32 %l.12 to i64 + %gep.src.4 = getelementptr i64, ptr %src.4, i64 %iv + %l.4 = load i64, ptr %gep.src.4, align 8 + %mul = mul i64 %l.12.ext, %l.4 + %gep.dst = getelementptr i64, ptr %dst, i64 %iv + store i64 %mul, ptr %gep.dst + %iv.next = add nuw nsw i64 %iv, 1 + %c = icmp eq i64 %iv.next, %N + br i1 %c, label %exit, label %loop, !llvm.loop !1 + +exit: + ret void +} + +define void @cse_volatile_loads(ptr %src, ptr noalias %dst, i64 %N) { +; CHECK-LABEL: define void @cse_volatile_loads( +; CHECK-SAME: ptr [[SRC:%.*]], ptr noalias [[DST:%.*]], i64 [[N:%.*]]) { +; CHECK-NEXT: entry: +; CHECK-NEXT: [[SRC_4:%.*]] = getelementptr i8, ptr [[SRC]], i64 4 +; CHECK-NEXT: [[SRC_12:%.*]] = getelementptr i8, ptr [[SRC]], i64 12 +; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], -1 +; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[N]], 1 +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[TMP0]], 1 +; CHECK-NEXT: br i1 [[TMP1]], label [[EXIT_UNR_LCSSA:%.*]], label [[ENTRY_NEW:%.*]] +; CHECK: entry.new: +; CHECK-NEXT: [[UNROLL_ITER:%.*]] = sub i64 [[N]], [[XTRAITER]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[IV_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[GEP_SRC_12:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV]] +; CHECK-NEXT: [[L_12:%.*]] = load i64, ptr [[GEP_SRC_12]], align 8 +; CHECK-NEXT: [[GEP_SRC_4:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV]] +; CHECK-NEXT: [[L_4:%.*]] = load volatile i64, ptr [[GEP_SRC_4]], align 8 +; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[L_12]], [[L_4]] +; CHECK-NEXT: [[GEP_DST:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV]] +; CHECK-NEXT: store i64 [[MUL]], ptr [[GEP_DST]], align 8 +; CHECK-NEXT: [[IV_NEXT:%.*]] = add nuw nsw i64 [[IV]], 1 +; CHECK-NEXT: [[GEP_SRC_12_1:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_12_1:%.*]] = load i64, ptr [[GEP_SRC_12_1]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_1:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_4_1:%.*]] = load volatile i64, ptr [[GEP_SRC_4_1]], align 8 +; CHECK-NEXT: [[MUL_1:%.*]] = mul i64 [[L_12_1]], [[L_4_1]] +; CHECK-NEXT: [[GEP_DST_1:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_NEXT]] +; CHECK-NEXT: store i64 [[MUL_1]], ptr [[GEP_DST_1]], align 8 +; CHECK-NEXT: [[IV_NEXT_1]] = add nuw nsw i64 [[IV]], 2 +; CHECK-NEXT: [[NITER_NEXT_1]] = add i64 [[NITER]], 2 +; CHECK-NEXT: [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]] +; CHECK-NEXT: br i1 [[NITER_NCMP_1]], label [[EXIT_UNR_LCSSA_LOOPEXIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP4:![0-9]+]] +; CHECK: exit.unr-lcssa.loopexit: +; CHECK-NEXT: [[IV_UNR_PH:%.*]] = phi i64 [ [[IV_NEXT_1]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT_UNR_LCSSA]] +; CHECK: exit.unr-lcssa: +; CHECK-NEXT: [[IV_UNR:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_UNR_PH]], [[EXIT_UNR_LCSSA_LOOPEXIT]] ] +; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 0 +; CHECK-NEXT: br i1 [[LCMP_MOD]], label [[LOOP_EPIL_PREHEADER:%.*]], label [[EXIT:%.*]] +; CHECK: loop.epil.preheader: +; CHECK-NEXT: br label [[LOOP_EPIL:%.*]] +; CHECK: loop.epil: +; CHECK-NEXT: [[GEP_SRC_12_EPIL:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_12_EPIL:%.*]] = load i64, ptr [[GEP_SRC_12_EPIL]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_EPIL:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_4_EPIL:%.*]] = load volatile i64, ptr [[GEP_SRC_4_EPIL]], align 8 +; CHECK-NEXT: [[MUL_EPIL:%.*]] = mul i64 [[L_12_EPIL]], [[L_4_EPIL]] +; CHECK-NEXT: [[GEP_DST_EPIL:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_UNR]] +; CHECK-NEXT: store i64 [[MUL_EPIL]], ptr [[GEP_DST_EPIL]], align 8 +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: ret void +; +entry: + %src.4 = getelementptr i8, ptr %src, i64 4 + %src.12 = getelementptr i8, ptr %src, i64 12 + br label %loop + +loop: + %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ] + %gep.src.12 = getelementptr i64, ptr %src.12, i64 %iv + %l.12 = load i64, ptr %gep.src.12, align 8 + %gep.src.4 = getelementptr i64, ptr %src.4, i64 %iv + %l.4 = load volatile i64, ptr %gep.src.4, align 8 + %mul = mul i64 %l.12, %l.4 + %gep.dst = getelementptr i64, ptr %dst, i64 %iv + store i64 %mul, ptr %gep.dst + %iv.next = add nuw nsw i64 %iv, 1 + %c = icmp eq i64 %iv.next, %N + br i1 %c, label %exit, label %loop, !llvm.loop !1 + +exit: + ret void +} + +define void @cse_atomic_loads(ptr %src, ptr noalias %dst, i64 %N) { +; CHECK-LABEL: define void @cse_atomic_loads( +; CHECK-SAME: ptr [[SRC:%.*]], ptr noalias [[DST:%.*]], i64 [[N:%.*]]) { +; CHECK-NEXT: entry: +; CHECK-NEXT: [[SRC_4:%.*]] = getelementptr i8, ptr [[SRC]], i64 4 +; CHECK-NEXT: [[SRC_12:%.*]] = getelementptr i8, ptr [[SRC]], i64 12 +; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], -1 +; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[N]], 1 +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[TMP0]], 1 +; CHECK-NEXT: br i1 [[TMP1]], label [[EXIT_UNR_LCSSA:%.*]], label [[ENTRY_NEW:%.*]] +; CHECK: entry.new: +; CHECK-NEXT: [[UNROLL_ITER:%.*]] = sub i64 [[N]], [[XTRAITER]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[IV_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[GEP_SRC_12:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV]] +; CHECK-NEXT: [[L_12:%.*]] = load i64, ptr [[GEP_SRC_12]], align 8 +; CHECK-NEXT: [[GEP_SRC_4:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV]] +; CHECK-NEXT: [[L_4:%.*]] = load atomic i64, ptr [[GEP_SRC_4]] unordered, align 8 +; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[L_12]], [[L_4]] +; CHECK-NEXT: [[GEP_DST:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV]] +; CHECK-NEXT: store i64 [[MUL]], ptr [[GEP_DST]], align 8 +; CHECK-NEXT: [[IV_NEXT:%.*]] = add nuw nsw i64 [[IV]], 1 +; CHECK-NEXT: [[GEP_SRC_12_1:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_12_1:%.*]] = load i64, ptr [[GEP_SRC_12_1]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_1:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_4_1:%.*]] = load atomic i64, ptr [[GEP_SRC_4_1]] unordered, align 8 +; CHECK-NEXT: [[MUL_1:%.*]] = mul i64 [[L_12_1]], [[L_4_1]] +; CHECK-NEXT: [[GEP_DST_1:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_NEXT]] +; CHECK-NEXT: store i64 [[MUL_1]], ptr [[GEP_DST_1]], align 8 +; CHECK-NEXT: [[IV_NEXT_1]] = add nuw nsw i64 [[IV]], 2 +; CHECK-NEXT: [[NITER_NEXT_1]] = add i64 [[NITER]], 2 +; CHECK-NEXT: [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]] +; CHECK-NEXT: br i1 [[NITER_NCMP_1]], label [[EXIT_UNR_LCSSA_LOOPEXIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP5:![0-9]+]] +; CHECK: exit.unr-lcssa.loopexit: +; CHECK-NEXT: [[IV_UNR_PH:%.*]] = phi i64 [ [[IV_NEXT_1]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT_UNR_LCSSA]] +; CHECK: exit.unr-lcssa: +; CHECK-NEXT: [[IV_UNR:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_UNR_PH]], [[EXIT_UNR_LCSSA_LOOPEXIT]] ] +; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 0 +; CHECK-NEXT: br i1 [[LCMP_MOD]], label [[LOOP_EPIL_PREHEADER:%.*]], label [[EXIT:%.*]] +; CHECK: loop.epil.preheader: +; CHECK-NEXT: br label [[LOOP_EPIL:%.*]] +; CHECK: loop.epil: +; CHECK-NEXT: [[GEP_SRC_12_EPIL:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_12_EPIL:%.*]] = load i64, ptr [[GEP_SRC_12_EPIL]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_EPIL:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_4_EPIL:%.*]] = load atomic i64, ptr [[GEP_SRC_4_EPIL]] unordered, align 8 +; CHECK-NEXT: [[MUL_EPIL:%.*]] = mul i64 [[L_12_EPIL]], [[L_4_EPIL]] +; CHECK-NEXT: [[GEP_DST_EPIL:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_UNR]] +; CHECK-NEXT: store i64 [[MUL_EPIL]], ptr [[GEP_DST_EPIL]], align 8 +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: ret void +; +entry: + %src.4 = getelementptr i8, ptr %src, i64 4 + %src.12 = getelementptr i8, ptr %src, i64 12 + br label %loop + +loop: + %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ] + %gep.src.12 = getelementptr i64, ptr %src.12, i64 %iv + %l.12 = load i64, ptr %gep.src.12, align 8 + %gep.src.4 = getelementptr i64, ptr %src.4, i64 %iv + %l.4 = load atomic i64, ptr %gep.src.4 unordered, align 8 + %mul = mul i64 %l.12, %l.4 + %gep.dst = getelementptr i64, ptr %dst, i64 %iv + store i64 %mul, ptr %gep.dst + %iv.next = add nuw nsw i64 %iv, 1 + %c = icmp eq i64 %iv.next, %N + br i1 %c, label %exit, label %loop, !llvm.loop !1 + +exit: + ret void +} + +define void @cse_load_may_be_clobbered(ptr %src, ptr %dst, i64 %N) { +; CHECK-LABEL: define void @cse_load_may_be_clobbered( +; CHECK-SAME: ptr [[SRC:%.*]], ptr [[DST:%.*]], i64 [[N:%.*]]) { +; CHECK-NEXT: entry: +; CHECK-NEXT: [[SRC_4:%.*]] = getelementptr i8, ptr [[SRC]], i64 4 +; CHECK-NEXT: [[SRC_12:%.*]] = getelementptr i8, ptr [[SRC]], i64 12 +; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[N]], -1 +; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[N]], 1 +; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[TMP0]], 1 +; CHECK-NEXT: br i1 [[TMP1]], label [[EXIT_UNR_LCSSA:%.*]], label [[ENTRY_NEW:%.*]] +; CHECK: entry.new: +; CHECK-NEXT: [[UNROLL_ITER:%.*]] = sub i64 [[N]], [[XTRAITER]] +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[IV_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[ENTRY_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[LOOP]] ] +; CHECK-NEXT: [[GEP_SRC_12:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV]] +; CHECK-NEXT: [[L_12:%.*]] = load i64, ptr [[GEP_SRC_12]], align 8 +; CHECK-NEXT: [[GEP_SRC_4:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV]] +; CHECK-NEXT: [[L_4:%.*]] = load i64, ptr [[GEP_SRC_4]], align 8 +; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[L_12]], [[L_4]] +; CHECK-NEXT: [[GEP_DST:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV]] +; CHECK-NEXT: store i64 [[MUL]], ptr [[GEP_DST]], align 8 +; CHECK-NEXT: [[IV_NEXT:%.*]] = add nuw nsw i64 [[IV]], 1 +; CHECK-NEXT: [[GEP_SRC_12_1:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_12_1:%.*]] = load i64, ptr [[GEP_SRC_12_1]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_1:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_NEXT]] +; CHECK-NEXT: [[L_4_1:%.*]] = load i64, ptr [[GEP_SRC_4_1]], align 8 +; CHECK-NEXT: [[MUL_1:%.*]] = mul i64 [[L_12_1]], [[L_4_1]] +; CHECK-NEXT: [[GEP_DST_1:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_NEXT]] +; CHECK-NEXT: store i64 [[MUL_1]], ptr [[GEP_DST_1]], align 8 +; CHECK-NEXT: [[IV_NEXT_1]] = add nuw nsw i64 [[IV]], 2 +; CHECK-NEXT: [[NITER_NEXT_1]] = add i64 [[NITER]], 2 +; CHECK-NEXT: [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]] +; CHECK-NEXT: br i1 [[NITER_NCMP_1]], label [[EXIT_UNR_LCSSA_LOOPEXIT:%.*]], label [[LOOP]], !llvm.loop [[LOOP6:![0-9]+]] +; CHECK: exit.unr-lcssa.loopexit: +; CHECK-NEXT: [[IV_UNR_PH:%.*]] = phi i64 [ [[IV_NEXT_1]], [[LOOP]] ] +; CHECK-NEXT: br label [[EXIT_UNR_LCSSA]] +; CHECK: exit.unr-lcssa: +; CHECK-NEXT: [[IV_UNR:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_UNR_PH]], [[EXIT_UNR_LCSSA_LOOPEXIT]] ] +; CHECK-NEXT: [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 0 +; CHECK-NEXT: br i1 [[LCMP_MOD]], label [[LOOP_EPIL_PREHEADER:%.*]], label [[EXIT:%.*]] +; CHECK: loop.epil.preheader: +; CHECK-NEXT: br label [[LOOP_EPIL:%.*]] +; CHECK: loop.epil: +; CHECK-NEXT: [[GEP_SRC_12_EPIL:%.*]] = getelementptr i64, ptr [[SRC_12]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_12_EPIL:%.*]] = load i64, ptr [[GEP_SRC_12_EPIL]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_EPIL:%.*]] = getelementptr i64, ptr [[SRC_4]], i64 [[IV_UNR]] +; CHECK-NEXT: [[L_4_EPIL:%.*]] = load i64, ptr [[GEP_SRC_4_EPIL]], align 8 +; CHECK-NEXT: [[MUL_EPIL:%.*]] = mul i64 [[L_12_EPIL]], [[L_4_EPIL]] +; CHECK-NEXT: [[GEP_DST_EPIL:%.*]] = getelementptr i64, ptr [[DST]], i64 [[IV_UNR]] +; CHECK-NEXT: store i64 [[MUL_EPIL]], ptr [[GEP_DST_EPIL]], align 8 +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: ret void +; +entry: + %src.4 = getelementptr i8, ptr %src, i64 4 + %src.12 = getelementptr i8, ptr %src, i64 12 + br label %loop + +loop: + %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ] + %gep.src.12 = getelementptr i64, ptr %src.12, i64 %iv + %l.12 = load i64, ptr %gep.src.12, align 8 + %gep.src.4 = getelementptr i64, ptr %src.4, i64 %iv + %l.4 = load i64, ptr %gep.src.4, align 8 + %mul = mul i64 %l.12, %l.4 + %gep.dst = getelementptr i64, ptr %dst, i64 %iv + store i64 %mul, ptr %gep.dst + %iv.next = add nuw nsw i64 %iv, 1 + %c = icmp eq i64 %iv.next, %N + br i1 %c, label %exit, label %loop, !llvm.loop !1 + +exit: + ret void +} + + +declare void @foo() + +define void @loop_body_with_dead_blocks(ptr %src) { +; CHECK-LABEL: define void @loop_body_with_dead_blocks( +; CHECK-SAME: ptr [[SRC:%.*]]) { +; CHECK-NEXT: entry: +; CHECK-NEXT: br label [[OUTER_HEADER:%.*]] +; CHECK: outer.header.loopexit: +; CHECK-NEXT: br label [[OUTER_HEADER]] +; CHECK: outer.header: +; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] +; CHECK: loop.header: +; CHECK-NEXT: br label [[LOOP_BB:%.*]] +; CHECK: loop.bb.dead: +; CHECK-NEXT: unreachable +; CHECK: loop.bb: +; CHECK-NEXT: [[L_1:%.*]] = load i32, ptr [[SRC]], align 8 +; CHECK-NEXT: [[C_1:%.*]] = icmp eq i32 [[L_1]], 0 +; CHECK-NEXT: br i1 [[C_1]], label [[OUTER_HEADER_LOOPEXIT:%.*]], label [[LOOP_LATCH:%.*]] +; CHECK: loop.latch: +; CHECK-NEXT: call void @foo() +; CHECK-NEXT: [[L_2:%.*]] = load i32, ptr [[SRC]], align 8 +; CHECK-NEXT: [[C_2:%.*]] = icmp eq i32 [[L_2]], 1 +; CHECK-NEXT: br i1 [[C_2]], label [[EXIT:%.*]], label [[LOOP_HEADER_1:%.*]], !llvm.loop [[LOOP7:![0-9]+]] +; CHECK: loop.header.1: +; CHECK-NEXT: br label [[LOOP_BB_1:%.*]] +; CHECK: loop.bb.1: +; CHECK-NEXT: [[L_1_1:%.*]] = load i32, ptr [[SRC]], align 8 +; CHECK-NEXT: [[C_1_1:%.*]] = icmp eq i32 [[L_1_1]], 0 +; CHECK-NEXT: br i1 [[C_1_1]], label [[OUTER_HEADER_LOOPEXIT]], label [[LOOP_LATCH_1:%.*]] +; CHECK: loop.latch.1: +; CHECK-NEXT: call void @foo() +; CHECK-NEXT: [[L_2_1:%.*]] = load i32, ptr [[SRC]], align 8 +; CHECK-NEXT: [[C_2_1:%.*]] = icmp eq i32 [[L_2_1]], 1 +; CHECK-NEXT: br i1 [[C_2_1]], label [[EXIT]], label [[LOOP_HEADER]], !llvm.loop [[LOOP9:![0-9]+]] +; CHECK: exit: +; CHECK-NEXT: ret void +; +entry: + br label %outer.header + +outer.header: + br label %loop.header + +loop.header: + br label %loop.bb + +loop.bb.dead: + br label %loop.bb + +loop.bb: + %l.1 = load i32, ptr %src, align 8 + %c.1 = icmp eq i32 %l.1, 0 + br i1 %c.1, label %outer.header, label %loop.latch + +loop.latch: + call void @foo() + %l.2 = load i32, ptr %src, align 8 + %c.2 = icmp eq i32 %l.2, 1 + br i1 %c.2, label %exit, label %loop.header, !llvm.loop !1 + +exit: + ret void +} + +!0 = !{!"llvm.loop.mustprogress"} +!1 = distinct !{!1, !0, !2} +!2 = !{!"llvm.loop.unroll.count", i32 2} +;. +; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]} +; CHECK: [[META1]] = !{!"llvm.loop.mustprogress"} +; CHECK: [[META2]] = !{!"llvm.loop.unroll.disable"} +; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META1]], [[META2]]} +; CHECK: [[LOOP4]] = distinct !{[[LOOP4]], [[META1]], [[META2]]} +; CHECK: [[LOOP5]] = distinct !{[[LOOP5]], [[META1]], [[META2]]} +; CHECK: [[LOOP6]] = distinct !{[[LOOP6]], [[META1]], [[META2]]} +; CHECK: [[LOOP7]] = distinct !{[[LOOP7]], [[META1]], [[META8:![0-9]+]]} +; CHECK: [[META8]] = !{!"llvm.loop.unroll.count", i32 2} +; CHECK: [[LOOP9]] = distinct !{[[LOOP9]], [[META1]], [[META2]]} +;. diff --git a/llvm/test/Transforms/PhaseOrdering/AArch64/extra-unroll-simplifications.ll b/llvm/test/Transforms/PhaseOrdering/AArch64/extra-unroll-simplifications.ll index 6132c35c96ca3..b32f4e2a258cd 100644 --- a/llvm/test/Transforms/PhaseOrdering/AArch64/extra-unroll-simplifications.ll +++ b/llvm/test/Transforms/PhaseOrdering/AArch64/extra-unroll-simplifications.ll @@ -72,6 +72,86 @@ exit: ret void } +define void @cse_matching_load_from_previous_unrolled_iteration(i32 %N, ptr %src, ptr noalias %dst) { +; CHECK-LABEL: define void @cse_matching_load_from_previous_unrolled_iteration( +; CHECK-SAME: i32 [[N:%.*]], ptr nocapture readonly [[SRC:%.*]], ptr noalias nocapture writeonly [[DST:%.*]]) local_unnamed_addr #[[ATTR0]] { +; CHECK-NEXT: entry: +; CHECK-NEXT: [[SRC_4:%.*]] = getelementptr i8, ptr [[SRC]], i64 4 +; CHECK-NEXT: [[SRC_12:%.*]] = getelementptr i8, ptr [[SRC]], i64 12 +; CHECK-NEXT: [[CMP141:%.*]] = icmp sgt i32 [[N]], 0 +; CHECK-NEXT: br i1 [[CMP141]], label [[LOOP_LATCH_PREHEADER:%.*]], label [[EXIT:%.*]] +; CHECK: loop.latch.preheader: +; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext nneg i32 [[N]] to i64 +; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 1 +; CHECK-NEXT: [[TMP0:%.*]] = icmp eq i32 [[N]], 1 +; CHECK-NEXT: br i1 [[TMP0]], label [[EXIT_LOOPEXIT_UNR_LCSSA:%.*]], label [[LOOP_LATCH_PREHEADER_NEW:%.*]] +; CHECK: loop.latch.preheader.new: +; CHECK-NEXT: [[UNROLL_ITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 2147483646 +; CHECK-NEXT: br label [[LOOP_LATCH:%.*]] +; CHECK: loop.latch: +; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER_NEW]] ], [ [[INDVARS_IV_NEXT_1:%.*]], [[LOOP_LATCH]] ] +; CHECK-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[LOOP_LATCH]] ] +; CHECK-NEXT: [[GEP_SRC_12:%.*]] = getelementptr <2 x i32>, ptr [[SRC_12]], i64 [[INDVARS_IV]] +; CHECK-NEXT: [[L_12:%.*]] = load <2 x i32>, ptr [[GEP_SRC_12]], align 8 +; CHECK-NEXT: [[GEP_SRC_4:%.*]] = getelementptr <2 x i32>, ptr [[SRC_4]], i64 [[INDVARS_IV]] +; CHECK-NEXT: [[L_4:%.*]] = load <2 x i32>, ptr [[GEP_SRC_4]], align 8 +; CHECK-NEXT: [[MUL:%.*]] = mul <2 x i32> [[L_4]], [[L_12]] +; CHECK-NEXT: [[GEP_DST:%.*]] = getelementptr <2 x i32>, ptr [[DST]], i64 [[INDVARS_IV]] +; CHECK-NEXT: store <2 x i32> [[MUL]], ptr [[GEP_DST]], align 8 +; CHECK-NEXT: [[INDVARS_IV_NEXT:%.*]] = or disjoint i64 [[INDVARS_IV]], 1 +; CHECK-NEXT: [[GEP_SRC_12_1:%.*]] = getelementptr <2 x i32>, ptr [[SRC_12]], i64 [[INDVARS_IV_NEXT]] +; CHECK-NEXT: [[L_12_1:%.*]] = load <2 x i32>, ptr [[GEP_SRC_12_1]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_1:%.*]] = getelementptr <2 x i32>, ptr [[SRC_4]], i64 [[INDVARS_IV_NEXT]] +; CHECK-NEXT: [[L_4_1:%.*]] = load <2 x i32>, ptr [[GEP_SRC_4_1]], align 8 +; CHECK-NEXT: [[MUL_1:%.*]] = mul <2 x i32> [[L_4_1]], [[L_12_1]] +; CHECK-NEXT: [[GEP_DST_1:%.*]] = getelementptr <2 x i32>, ptr [[DST]], i64 [[INDVARS_IV_NEXT]] +; CHECK-NEXT: store <2 x i32> [[MUL_1]], ptr [[GEP_DST_1]], align 8 +; CHECK-NEXT: [[INDVARS_IV_NEXT_1]] = add nuw nsw i64 [[INDVARS_IV]], 2 +; CHECK-NEXT: [[NITER_NEXT_1]] = add i64 [[NITER]], 2 +; CHECK-NEXT: [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]] +; CHECK-NEXT: br i1 [[NITER_NCMP_1]], label [[EXIT_LOOPEXIT_UNR_LCSSA]], label [[LOOP_LATCH]], !llvm.loop [[LOOP3:![0-9]+]] +; CHECK: exit.loopexit.unr-lcssa: +; CHECK-NEXT: [[INDVARS_IV_UNR:%.*]] = phi i64 [ 0, [[LOOP_LATCH_PREHEADER]] ], [ [[INDVARS_IV_NEXT_1]], [[LOOP_LATCH]] ] +; CHECK-NEXT: [[LCMP_MOD_NOT:%.*]] = icmp eq i64 [[XTRAITER]], 0 +; CHECK-NEXT: br i1 [[LCMP_MOD_NOT]], label [[EXIT]], label [[LOOP_LATCH_EPIL:%.*]] +; CHECK: loop.latch.epil: +; CHECK-NEXT: [[GEP_SRC_12_EPIL:%.*]] = getelementptr <2 x i32>, ptr [[SRC_12]], i64 [[INDVARS_IV_UNR]] +; CHECK-NEXT: [[L_12_EPIL:%.*]] = load <2 x i32>, ptr [[GEP_SRC_12_EPIL]], align 8 +; CHECK-NEXT: [[GEP_SRC_4_EPIL:%.*]] = getelementptr <2 x i32>, ptr [[SRC_4]], i64 [[INDVARS_IV_UNR]] +; CHECK-NEXT: [[L_4_EPIL:%.*]] = load <2 x i32>, ptr [[GEP_SRC_4_EPIL]], align 8 +; CHECK-NEXT: [[MUL_EPIL:%.*]] = mul <2 x i32> [[L_4_EPIL]], [[L_12_EPIL]] +; CHECK-NEXT: [[GEP_DST_EPIL:%.*]] = getelementptr <2 x i32>, ptr [[DST]], i64 [[INDVARS_IV_UNR]] +; CHECK-NEXT: store <2 x i32> [[MUL_EPIL]], ptr [[GEP_DST_EPIL]], align 8 +; CHECK-NEXT: br label [[EXIT]] +; CHECK: exit: +; CHECK-NEXT: ret void +; +entry: + %src.4 = getelementptr i8, ptr %src, i64 4 + %src.12 = getelementptr i8, ptr %src, i64 12 + br label %loop.header + +loop.header: + %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] + %cmp14 = icmp slt i32 %iv, %N + br i1 %cmp14, label %loop.latch, label %exit + +loop.latch: + %iv.ext = zext i32 %iv to i64 + %gep.src.12 = getelementptr <2 x i32>, ptr %src.12, i64 %iv.ext + %l.12 = load <2 x i32>, ptr %gep.src.12, align 8 + %gep.src.4 = getelementptr <2 x i32>, ptr %src.4, i64 %iv.ext + %l.4 = load <2 x i32>, ptr %gep.src.4, align 8 + %mul = mul <2 x i32> %l.12, %l.4 + %gep.dst = getelementptr <2 x i32>, ptr %dst, i64 %iv.ext + store <2 x i32> %mul, ptr %gep.dst + %iv.next = add nuw nsw i32 %iv, 1 + br label %loop.header, !llvm.loop !0 + +exit: + ret void +} + !0 = distinct !{!0, !1, !2} !1 = !{!"llvm.loop.mustprogress"} !2 = !{!"llvm.loop.unroll.count", i32 2} @@ -79,4 +159,5 @@ exit: ; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]} ; CHECK: [[META1]] = !{!"llvm.loop.mustprogress"} ; CHECK: [[META2]] = !{!"llvm.loop.unroll.disable"} +; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META1]], [[META2]]} ;.